EP0385224B1 - N-hydroxypyrazoles substitués et fongicides les contenant - Google Patents

N-hydroxypyrazoles substitués et fongicides les contenant Download PDF

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Publication number
EP0385224B1
EP0385224B1 EP90103176A EP90103176A EP0385224B1 EP 0385224 B1 EP0385224 B1 EP 0385224B1 EP 90103176 A EP90103176 A EP 90103176A EP 90103176 A EP90103176 A EP 90103176A EP 0385224 B1 EP0385224 B1 EP 0385224B1
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Prior art keywords
substituted
general formula
compound
hydrogen
formula
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EP90103176A
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German (de)
English (en)
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EP0385224A1 (fr
Inventor
Franz Dr. Schuetz
Hubert Dr. Sauter
Siegbert Dr. Brand
Bernd Dr. Wenderoth
Ulf Dr. Baus
Wolfgang Dr. Reuther
Gisela Dr. Lorenz
Eberhard Dr. Ammermann
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BASF SE
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BASF SE
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D249/00—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms
    • C07D249/02—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms not condensed with other rings
    • C07D249/08—1,2,4-Triazoles; Hydrogenated 1,2,4-triazoles
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
    • C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D231/12—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
    • A01N43/56—1,2-Diazoles; Hydrogenated 1,2-diazoles
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
    • A01N43/58—1,2-Diazines; Hydrogenated 1,2-diazines
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
    • C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D231/14—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
    • C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D231/14—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D231/16—Halogen atoms or nitro radicals
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/54—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings condensed with carbocyclic rings or ring systems
    • C07D231/56—Benzopyrazoles; Hydrogenated benzopyrazoles
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
    • C07D233/54—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members
    • C07D233/56—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring carbon atoms

Definitions

  • the present invention relates to new substituted N-hydroxypyrazoles and fungicides which contain these compounds.
  • substituted N-hydroxypyrazoles of the general formula I in the R1, R2 and R3 are the same or different and are hydrogen, C1-C4-alkyl, C1-C2-haloalkyl, C3-C6-cycloalkyl, C1-C4-alkoxycarbonyl, halogen, phenyl or phenyl-C1-C4-alkyl, where the phenyl radical is optionally substituted by one or more of the following radicals: C1-C4-alkyl, C3-C6-cycloalkyl, C1-C2-haloalkyl, C1-C4-alkoxy, halogen, cyano, nitro, or R2 and R3 together with the pyrazole ring, the substituents of which they are, form an indazole ring or tetrahydroindazole ring, these rings optionally being substituted by C1-C4-alkyl, X represents CH or N,
  • R1, R2 and R3 are the same or different and mean, for example, C1-C4-alkyl (for example methyl, ethyl, n- or iso-propyl, n-, iso-, sec.- or tert.-butyl), C1-C2- Haloalkyl (e.g. difluoromethyl, trifluoromethyl, chloromethyl, Dichloromethyl, trichloromethyl, pentafluoroethyl), C3-C6-cycloalkyl (e.g.
  • C1-C4-alkoxycarbonyl e.g. methoxycarbonyl, ethoxycarbonyl, propoxycarbonyl, butoxycarbonyl
  • halogen e.g. fluorine, chlorine, bromine, iodine
  • phenyl or phenyl-C1-C4-alkyl for example benzyl, 2-phenylethyl, 3-phenylpropyl, 4-phenylbutyl
  • the phenyl radical optionally being substituted by one or more (one to three) of the following radicals: C1-C4 -Alkyl (e.g.
  • C3-C6-cycloalkyl e.g. cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl
  • C1-C2-haloalkyl e.g. trifluoromethyl
  • C1-C4-alkoxy e.g.
  • Salts are, for example, the plant-compatible acid addition salts, e.g. the salts with inorganic or organic acids, such as, for example, the salts of hydrochloric acid, hydrobromic acid, nitric acid, oxalic acid, acetic acid, sulfuric acid, phosphoric acid or dodecylbenzenesulfonic acid.
  • the effectiveness of the salts is due to the cation, so that the choice of the anion is generally arbitrary.
  • the compounds of the formula I can be converted into metal complexes by known methods. This can be done by reacting these compounds with metal salts, e.g. Salting of the metals copper, zinc, iron, manganese or nickel, for example copper (II) chloride, zinc (II) chloride, iron (III) chloride, copper (II) nitrate, manganese (II) chloride or nickel (II) -bromide.
  • metal salts e.g. Salting of the metals copper, zinc, iron, manganese or nickel, for example copper (II) chloride, zinc (II) chloride, iron (III) chloride, copper (II) nitrate, manganese (II) chloride or nickel (II) -bromide.
  • the new compounds of general formula I according to claim 1 are prepared, for example, by first N-hydroxypyrazoles of general formula II with a base (for example sodium hydroxide or Potassium hydroxide) is converted into the corresponding sodium or potassium salts and then reacted in an inert solvent or diluent with a substituted benzyl compound of the general formula III.
  • a base for example sodium hydroxide or Potassium hydroxide
  • solvents or diluents are Acetone, acetonitrile, dimethyl sulfoxide, dioxane, dimethylformamide, N-methyl-pyrrolidone, N, N'-dimethylpropyleneurea or pyridine. It may also be advantageous to add a catalyst such as e.g. Add tetramethylethylenediamine or tris (3,6-dioxoheptyl) amine in an amount of 0.01 to 10 (% by weight), based on compound III.
  • a catalyst such as e.g. Add tetramethylethylenediamine or tris (3,6-dioxoheptyl) amine in an amount of 0.01 to 10 (% by weight), based on compound III.
  • phase transfer catalysts are trioctylpropylammonium chloride or cetyltrimethylammonium chloride.
  • R1, R2, R3 and X have the meanings given above, Y means chloride, bromide, p-toluenesulfonate, methanesulfonate, trifluoromethanesulfonate.
  • pyrazoles of the general formula IV are first converted into their metal salts of the general formula V (Me+ means a cation of the alkali metals) using an alkali metal hydroxide, alkali metal hydroxide or alkali metal carbonate.
  • the metal salts of the formula V obtained are then reacted with dibenzoyl peroxide in an inert organic solvent (for example tetrahydrofuran) or in a two-phase system (for example toluene / water), if appropriate in the presence of a phase transfer catalyst (for example benzyltriethylammonium chloride).
  • the reaction temperature is between 0 and 60 ° C.
  • an alkali metal salt of the general formula V is reacted with an aliphatic or aromatic peroxocarboxylic acid in such a way that the reaction temperature is between -5 ° C. and 60 ° C.
  • the reaction can be carried out in water as a solvent or in a two-phase system consisting of water and an inert organic solvent which is difficult to mix with water (for example toluene), if appropriate in the presence of a suitable phase transfer catalyst (for example benzyltriethylammonium chloride).
  • the peroxocarboxylic acid can be prepared in the reaction mixture from H2O2 and a carboxylic acid halide or a carboxylic acid anhydride or used in the form of an alkali or alkaline earth metal salt before the reaction.
  • the substituted benzyl compounds of the general formula III are also required to prepare the new compounds of the general formula I.
  • 2-methyl-phenylglyoxylic acid methyl ester-O-methyloxime VI can be prepared by reacting methyl 2-methylphenylglyoxylate VII, for example a) with O-methylhydroxylamine hydrochloride or b) with hydroxylamine hydrochloride to give the corresponding oxime and then with one Methylating agent of the formula CH3-L, in which L is a leaving group (eg chloride, bromide, iodide, methyl sulfate), brings to reaction (see. DE-36 23 921).
  • L is a leaving group
  • L is a leaving group
  • the reaction is carried out, for example, with bromine or chlorine in an inert solvent (for example carbon tetrachloride), optionally with exposure to a light source (for example mercury vapor lamp, 300 W) or with N-chlorine or N-bromine succinimide (cf. Horner, Winkelmann, Angew. Chem. 71 (1959) 349).
  • the reactions can be carried out, for example, in an inert solvent or diluent (for example dimethylformamide) in the presence of a base (for example potassium carbonate).
  • a base for example potassium carbonate
  • the procedure can also be followed in that the corresponding sulfonic acid is first converted into its sodium or potassium salt and then in an inert solvent or diluent (for example dimethylformamide) with a compound of the general formula IIIa or IIIb to give the substituted benzyl compounds of the general formula IIIc implements.
  • the new compounds are distinguished by excellent activity against a broad spectrum of phytopathogenic fungi, in particular from the class of the Ascomycetes and Basidiomycetes. Some of them are systemically effective and can be used as foliar and soil fungicides.
  • the fungicidal compounds are particularly interesting for controlling a large number of fungi on various crop plants or their seeds, in particular wheat, rye, barley, oats, rice, corn, lawn, cotton, soybeans, coffee, sugar cane, fruit and ornamental plants in horticulture and viticulture as well as vegetables - such as cucumbers, beans and pumpkin plants -.
  • the new compounds are particularly suitable for controlling the following plant diseases: Erysiphe graminis (powdery mildew) in cereals, Erysiphe cichoracearum and Sphaerotheca fuliginea on pumpkin plants, Podosphaera leucotricha on apples, Uncinula necator on vines, Puccinia species on cereals, Rhizoctonia species on cotton and lawn, Ustilago species on cereals and sugar cane, Venturia inaequalis (scab) on apples, Helminthosporium species on cereals, Septoria nodorum on wheat, Botrytis cinerea (gray mold) on strawberries, vines, Cercospora arachidicola on peanuts, Pseudocercosporella herpotrichoides on wheat, barley, Pyricularia oryzae on rice, Phytophthora infestans on potatoes and tomatoes, Fusarium and Verticillium species on different plants, Plasmopara viticola
  • the compounds are applied by spraying or dusting the plants with the active compounds or by treating the seeds of the plants with the active compounds. It is used before or after the plants or seeds are infected by the fungi.
  • the new substances can be converted into the customary formulations, such as solutions, emulsions, suspensions, dusts, powders, pastes and granules.
  • the application forms depend entirely on the purposes; in any case, they should ensure a fine and uniform distribution of the active substance.
  • the formulations are prepared in a known manner, for example by extending the active ingredient with solvents and / or carriers, if appropriate using emulsifiers and dispersants, and if water is used as the diluent, other organic solvents can also be used as auxiliary solvents.
  • solvents such as aromatics (e.g. xylene), chlorinated aromatics (e.g. chlorobenzenes), paraffins (e.g.
  • Carriers such as natural stone powder (eg kaolins, clays, talc, chalk) and synthetic stone powder (eg highly disperse silica, silicates); Emulsifiers such as nonionic and anionic emulsifiers (e.g. polyoxyethylene fatty alcohol ethers, alkyl sulfonates and aryl sulfonates) and dispersants such as lignin, sulfite liquors and methyl cellulose.
  • Carriers such as natural stone powder (eg kaolins, clays, talc, chalk) and synthetic stone powder (eg highly disperse silica, silicates)
  • Emulsifiers such as nonionic and anionic emulsifiers (e.g. polyoxyethylene fatty alcohol ethers, alkyl sulfonates and aryl sulfonates) and dispersants such as lignin, sulfite liquors and methyl cellulose.
  • the fungicidal compositions generally contain between 0.1 and 95, preferably between 0.5 and 90% by weight of active ingredient.
  • the application rates are between 0.02 and 3 kg of active ingredient or more per hectare.
  • the new compounds can also be used in material protection, e.g. against Paecilomyces variotii.
  • agents or the ready-to-use preparations produced therefrom such as solutions, emulsions, suspensions, powders, dusts, pastes or granules, are used in a known manner, for example by spraying, atomizing, dusting, scattering, pickling or pouring.
  • compositions according to the invention can also be present together with other active compounds, such as, for example, herbicides, insecticides, growth regulators and fungicides, or else mixed and applied with fertilizers.
  • active compounds such as, for example, herbicides, insecticides, growth regulators and fungicides, or else mixed and applied with fertilizers.
  • fungicidal activity spectrum is enlarged in many cases.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dentistry (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Agronomy & Crop Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Claims (9)

  1. N-Hydroxypyrazoles substitués, de formule générale I
    Figure imgb0018
     dans laquelle
    R¹, R² et R³ sont identiques ou différents et représentent hydrogène, alkyle en C1-C4, halogénalkyle en C1-C2, cycloalkyle en C3-C6, alcoxy en C1-C4-carbonyle, halogène, phényle ou phényl-alkyle en C1-C4 le reste phényle étant éventuellement substitué par un ou plusieurs restes, à savoir alkyle en C1-C4, cycloalkyle en C3-C6, halogénalkyle en C1-C2, alcoxy en C1-C4, halogène, cyano, nitro,
    ou R² et R³, ensemble avec le cycle pyrazole dont ils sont les substituants, formant un cycle indazole ou tétrahydro-indazole, ces cycles étant éventuellement substitués une à trois fois par alkyle en C1-C4,
    X représente CH ou N,
    ainsi que leurs sels d'addition d'acide et leurs complexes métalliques tolérés par les plantes.
  2. Procédé de préparation de N-hydroxypyrazoles substitués, de formule générale I, selon la revendication 1, caractérisé par le fait que l'on fait réagir, dans un solvant ou un diluant, en présence d'une base et éventuellement d'un catalyseur, un N-hydroxypyrazole de formule générale II
    Figure imgb0019
     dans laquelle
    R¹, R² et R³ ont les significations données dans la revendication 1, avec un dérivé de benzyle substitué, de formule générale III
    Figure imgb0020
     dans laquelle
    X = CH ou N et
    Y = chlorure, bromure, p-toluènesulfonate, méthanesulfonate ou trifluorométhanesulfonate.
  3. Fongicide, contenant un support inerte et une quantité efficace au point de vue fongicide d'un N-hydroxypyrazole substitué, de formule générale I, selon la revendication 1.
  4. Procédé de lutte contre les champignons, caractérisé par le fait que l'on traite les champignons ou les matériaux, plantes, semences ou le sol avec une quantité efficace au point de vue fongicide d'un N-hydroxypyrazole substitué, de formule générale I, selon la revendication 1.
  5. Composé de formule I, selon la revendication 1, dans lequel R¹ et R³ représentent hydrogène, R² chlore et X le reste CH.
  6. Composé de formule I, selon la revendication 1, dans lequel R¹ et R³ représentent hydrogène, R² chlore et X azote.
  7. Composé de formule I, selon la revendication 1, dans lequel R¹ et R³ représentent méthyle, R² hydrogène et X le reste CH.
  8. Composé de formule I, selon la revendication 1, dans lequel R¹ et R³ représentent méthyle, R² hydrogène et X azote.
  9. Composé de formule I, selon la revendication 1, dans lequel R¹, R² et R³ représentent hydrogène et X azote.
EP90103176A 1989-02-25 1990-02-20 N-hydroxypyrazoles substitués et fongicides les contenant Expired - Lifetime EP0385224B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3905948A DE3905948A1 (de) 1989-02-25 1989-02-25 Substituierte n-hydroxypyrazole und fungizide, die diese verbindungen enthalten
DE3905948 1989-02-25

Publications (2)

Publication Number Publication Date
EP0385224A1 EP0385224A1 (fr) 1990-09-05
EP0385224B1 true EP0385224B1 (fr) 1993-12-15

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EP90103176A Expired - Lifetime EP0385224B1 (fr) 1989-02-25 1990-02-20 N-hydroxypyrazoles substitués et fongicides les contenant

Country Status (16)

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US (1) US4957937A (fr)
EP (1) EP0385224B1 (fr)
JP (1) JP2786297B2 (fr)
KR (1) KR0144852B1 (fr)
AT (1) ATE98637T1 (fr)
AU (1) AU622285B2 (fr)
CA (1) CA2009795A1 (fr)
CS (1) CS9000881A3 (fr)
DE (2) DE3905948A1 (fr)
DK (1) DK0385224T3 (fr)
ES (1) ES2060828T3 (fr)
HU (1) HU207933B (fr)
IL (1) IL93299A (fr)
NZ (1) NZ232569A (fr)
PL (1) PL161282B1 (fr)
ZA (1) ZA901385B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ232785A (en) * 1989-03-15 1991-03-26 Janssen Pharmaceutica Nv 5-(1,2 benzisoxazol-, benzimidazol and benzisothiazol-3- yl)-1h-benzimadazol-2-yl carbamic acid ester derivatives preparatory processes, intermediates and anthelmintic compositions
DE4214174A1 (de) * 1992-04-30 1993-11-04 Basf Ag Verfahren zur herstellung von n-hydroxyazolen
KR950006150B1 (ko) * 1992-06-25 1995-06-09 재단법인한국화학연구소 피라졸을 함유한 프로페노익 에스테르 유도체
KR970006238B1 (en) * 1994-03-15 1997-04-25 Korea Res Inst Chem Tech Propenoic ester derivatives having 4-hydroxy pyrazole group
DE19645313A1 (de) 1996-11-04 1998-05-07 Basf Ag Substituierte 3-Benzylpyrazole
DE19711168A1 (de) 1997-03-18 1998-09-24 Basf Ag Phenylketiminooxybenzylverbindungen, Verfahren zu ihrer Herstellung und ihre Verwendung
KR100311846B1 (ko) * 1999-07-05 2001-10-18 우종일 신규 아크릴레이트계 살균제

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3409317A1 (de) * 1984-03-14 1985-09-19 Basf Ag, 6700 Ludwigshafen Nitrifikationsinhibierende 1-hydroxipyrazol-derivate
DE3545319A1 (de) * 1985-12-20 1987-06-25 Basf Ag Acrylsaeureester und fungizide, die diese verbindungen enthalten
DE3620579A1 (de) * 1986-06-19 1987-12-23 Basf Ag Hydroxypyrazol-derivate - verfahren zu ihrer herstellung und ihre verwendung gegen mikoorganismen
DE3623921A1 (de) * 1986-07-16 1988-01-21 Basf Ag Oximether und diese enthaltende fungizide

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DE59003823D1 (de) 1994-01-27
JPH02268164A (ja) 1990-11-01
JP2786297B2 (ja) 1998-08-13
CA2009795A1 (fr) 1990-08-25
AU5011090A (en) 1990-08-30
EP0385224A1 (fr) 1990-09-05
HU900974D0 (en) 1990-05-28
NZ232569A (en) 1990-12-21
ES2060828T3 (es) 1994-12-01
HU207933B (en) 1993-07-28
DK0385224T3 (da) 1994-01-24
US4957937A (en) 1990-09-18
KR910015545A (ko) 1991-09-30
CS275480B2 (en) 1992-02-19
KR0144852B1 (ko) 1998-07-15
HUT53492A (en) 1990-11-28
PL161282B1 (pl) 1993-06-30
DE3905948A1 (de) 1990-08-30
ZA901385B (en) 1991-10-30
ATE98637T1 (de) 1994-01-15
IL93299A (en) 1994-06-24
IL93299A0 (en) 1990-11-29
CS9000881A3 (en) 1992-02-19
AU622285B2 (en) 1992-04-02

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